Improvement in sleighs



ALONZO ARMSTRONG AND ALEXANDER WELLEROF BUFFALO, NEW YORK.

Lettera Patent No. 76,877, dated April 21, 1868.

IMPROVEMENT IN SLEIGHS.

ttp tlgchtle tuant 'tu in tipa tetfa't lgntent substituting prut at tte ma.

TO ALL WHOM IT MAY CONOERN Bc itv known that wc, ALoNzo ARMSTRONG ,and ALEXANDER WnLLnn, ofthe city of Buffalo, in the `county of Erie, and State of New York, have invented a certain new and useful Improvement' in Bob-Sleighs; and we do hereby declare that the following is a full and exact dcscriptionth erect', reference beinghad to the accompanying drawings, in Which- Figure I is a side elevation -of a bob-sleigh provided with our improvement.

Figure II is a rear elevation ofthe same.

Like letters of reference designate corresponding parts in both iigures.

The nature ot' our invention consists in connecting the front and rear bobs together by a curved reach, to allow the front bob to pass under the reach in turning, when said curved reach is used in combination with pendent links and hangers, and elevated standards for connecting the rear bob to the sleigh-body, so that the action of the reach may not prevent the free oscillation ot` the rear bob.

In the drawings, A is the box or body of the sleigh; B B the rear bob, or runners; c c, two pendent brackets, firmly fastened to the under side ofthe box; D D, two supports or standards, secured by bracing orv otherwise to thc bob, and of any suitable form or construction that will .permit the hinging orjointing of the -links or connecting-arms ee at their top, and be suiliciently strong to support the rear end ofthe sleigh-body,

which is sustained by joiuting the lower ends ofthe said linksand pendent arms c c. Il represents the curved reach connecting the front and rear pair of bobs together, thejointing of the reach to the front bobs, shown at.

H', being above the turn-table, upon which the front end of the sleigh-body rests, and the jointing at z' to thc rear bobs being suiciently low to insure a proper line of draught thereto, while the curvature of the reach allows the front bob to pass under it in the turning of the sleigh.

When two pairs of runners are connected by a reach, the inclination of either pair in passing over inequali' ties causes a kind of oscillating motion backwards and forwards ot the upper portion ofthe bobs." The connection between the two pairs of runners being unyielding, it is evident that any change in the inclination of either pair will produce a change in the relation ot' any two points'on top of the respective fbobsf causing them to slightly approach or recede from each other. Where both pairs of runners are connected tothe box or body of the 'sleigh at any two fixed points, asin the ordinary construction, it is manifest that this relative change in those points cannot take place, (except in a slight degree, which the looseness ot' the joints or connections may permit,) and, as a necessary consequence, the free and natural movement ofthe runners is prevented.

And, further, it is necessary that the joints at the connection ofthereach'to both vthe front and rear bobs should lic in the same horizontal line, otherwise the slackness of the joints 4could. allow only the slight-est possible oscillation of the rear bob, so that the curved reach, vinvolving a connection to the front bob above the turn-table, could not possibly be used with the ordinary modeof supporting the sleigh-body upon the rear bob; hence the necessity of using the pendent links, brackets, and standards above described forsupporting the sleigh-body, to permit the free oscillation of the rear bob when the curved reach is used.

What we claim as our invention, is-

The combination of the curved reach H with the pendent links, hangers, and elevated standards for supporting the sleigh-body upon the rear bob. v

" ALONZO ARMSTRONG,

A. WELLER. Witnesses:

W. J. CHAMBERLAIN,

V. H. BECKER. 

